Aerosol-assisted CVD of SnO from stannous alkoxide precursors

Michael S. Hill, Andrew L. Johnson, John P. Lowe, Kieran C. Molloy, James D. Parish, Thomas Wildsmith, Andrew L. Kingsley

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The stannous alkoxides [Sn(OR)2] [R = i-Pr, t-Bu, C(Et)Me2, CHPh2, CPh3] have been synthesised by reaction of Sn(NR′2)2 with two equivalents of HOR [R′ = Me, R = i-Pr; R′ = SiMe3, R = t-Bu, C(Et)Me2, CHPh2, CPh3]. Single crystal X-ray diffraction analysis of the bis(diphenylmethoxide) (4) and bis(triphenylmethoxide) (5) species have shown them to comprise three-coordinate Sn(ii) centres through dimerisation in the solid state with the alkoxide units adopting transoid and cisoid configurations across the {Sn2O2} cores respectively. Thermogravimetric analysis indicates clean decomposition and some evidence of volatility at temperatures >200 °C for all three aliphatic alkoxides, whereas both the diphenyl- and triphenylmethoxide compounds provide higher decomposition temperatures and, for the triphenylmethoxide derivative, a residual mass consistent with the formation of a carbon-containing residue. The previously reported iso-propoxide (1) and tert-butoxide (2) derivatives have been utilised in toluene solution to deposit SnO thin films by aerosol-assisted chemical vapour deposition (AACVD) on glass at temperatures between 300 and 450 °C. While SnO is deposited under hot wall conditions as the only identifiable phase by p-XRD and Raman spectroscopy for both precursors, morphological analysis by SEM reveals inferior substrate coverage in comparison to previously reported ureide-based precursor systems.

Original languageEnglish
Pages (from-to)18252-18258
Number of pages7
JournalDalton Transactions
Volume45
Issue number45
DOIs
Publication statusPublished - 7 Dec 2016

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